Belt conveyer.



T. ROBINS.

BELT GONVYER.

APPLIGAToN FILED 2313.16, 1907.

Patented Apr. 27, 1909.

2 BHEETS-SHEBT 1.

T. ROBINS.

BELT GONVEYER.

APPLIOATION FILED 1113.16. 1907.

91 9 ,638, Patented Apr. 27, 1909.

2 SHEETS-SHEET 2.

. Ullfllll) STATES PATENT OFFICE.

THOMAS ROBINS, OF NEW YORK, N. Y.

BELT coNvEYER.

No. classe.

To all who'm itgnay concern;

-Be it that I, .THOMAS Resins, a citizen of?,v United States, residing in the` borough. iManhattan, city, county, and State of-New York, have invented new and luseful Improvements in Belt Conveyers, of which the following is a specification.

This invention relates to idler pulleys adapted to support conveyer belts so as to raise the edges of a belt above its middle portion thus formin a trough in which the material carriedv b t e belt will be retained.

The" rimary o ject of the `invention 1s to provlde idler ulleys in which the pulleys are of c5 form 'and lare so arranged lindri that a lt supported thereon w1ll present,

a substantially uniform transverse curve thro h out its entirewidth and mounted 'on be'readilyassembled or disassembled.

' .so` that In accomplishing these objects I make use .of a plurality of cylindrical pulleys turning about axes l'- 1n the same vertical plane at slight angles to each other, belt is bent very slightl between any two adjacent pulleys iin the icller struc,- ture and presents no well-defined lines of lexure.' he pulleys of-each idler structure are mounted on tubular shaft sections ri 'dlysecured to uous e ce .-way 1s maintained thrcugh the sections embraed in each idler structure toserve as a conduit for the lubri material employed, which is introas du into the conduit so :formed at the ends and forced throu h` `o mn gs in the hollow shaft sections to egiectllxe lubrication of the pulleys. l

Two somewhat different idler structures the invention are illustrated in the accompaning drawings thestructure illustrated in igures 1 and 2, which show one form of the structure, being 4in. some-re- 3 andl 4, which show a slightly' diirferent -flgrm of structure.

Specication of Letters Patent. ppncauon mea February 1e, 1907. serial im. 357,761.

section 13, which is not sup suitable supportmgbrackets of such construction that a contin- 40- i-seveal sha slia spects. preferable to that illustrated in Figs.

Patented'April 27, 1909.

In 1, an idler pulley structure is illus'- trated in part -in elevation and in part in.

and illustrates the structure of the base 'of' the supporting brackets.

The idler structure illustrated in. Figs. .1 and 2 is mountedon a base board 1 to which aresecurely bolteda pair of r'I ,nai'n bracketsan auxiliary bracket 7 is secured by bolts 8.4

The ulprght portion or standard 4 of each main racket 2 is provided at the top with a double socket 9, and similar double socketsl 10 are provided at the to sv of the auxiliary bracketsfl. A, hollow s aftsection 11 1s fitted into the inner sockets 9 of the two main brackets and a slightly inclined hollow shaft section -12 is supported between each main bracket and the -auxilia bracket sea A cured thereto. Each auxiliary'- racket 7 carries in its outer socket 1 0 a hollow shaft rt'ed at its outei` end. The' double s oc et of each bracket is bored through so that an uninterrupted conduit is formed .bythe several I shaft sections and the interye portions' of the supporting brackets, and e several shaft sectionsl are secured against rotation by means of set screws 14, or the like.

The lubricating material passes out of the conduit presentedb'y the sha-ft sections through suitable perforations 15 formed therein and itis forced -into the conduit from grease-cups 16 fitted on the extremities of the outer shaftsections 13.

The lpulleys com rised in the idler structures i ustrated inll'igs. 1 and 2 are o'f different lengths and are six in number. Two very short ull'eys 17 fare carried' by the middle shalt) section 11l and two 4shghtly long'cr pulleys18 are mounted on the outer sections 13. The lo s't pulleys 19 are arranged between the maln brackets and the 'auxiharybracketa one of these pulleys turning on each of the shaft sections 12.

The entire idler structure is firmly secured -tolthe base board 1 by means of bolts l 20 passing through' the l base board and 'ing the shaft sections 13 and the pulleys 18 by others of eater length 'or by replacing the shaft sectgilons 1l and the pulleys 17 by others of ater length. f l A certain amount of angular adjustment Iof the'entire idler structure on the base board is provided for by the oppositely' placed transversely disposed slots 5 formed -in the base ortionsv of the in ain brackets 2 through which the .securing bolts 20 extend. Such adjustment is very convenient when the base board is not accurately placed on the supporting structure or when the bolt holes are not accurately located, as it'enables the idlers to be brought into proper position without shifting the ase' board.

A In Figs'. 3 m14 an iaier Structure sinus trated in which the auxiliary brackets are dispensed with and the several shaft sections are all supported a single pair of'brackets. Fig. 3 is aview vo an idler pulley structure in elevation, with the position of the belt thereon indicated in dotted lines. Fig. 4 is a view 'in vertical section of the idler pulley alone.

Inthe structure shown in 3 and 4, a

vbase board 30 carries the'en'tire structure,

bolteito this base' 'the brackets be board. Eaclof the, rackets has a double socket 32 at the top to afford supportfor the shaft sections upon which the .pulleys turn. A short shaft section 33 is arranged between two brackets and alonger shaft sec# tion 34 is litted into the outer socket of each bracket. Each of these' shaft sections 34 is.

` bent slightly approximately in the middle,

so that the outer portion beyond the bend is inclined somewhat more than the inner portion. A single pulley 35 is mounted on the shaft section 33 and a pair of pulleys 36 are sup orted upon each of the-shaft sections 34, r kept out of contact with each other `by set collars 37 adjustably mounted on the shaft sections. The shaft'sections 33 and 34 are Yhollow and form, 'together with the of the supporting brackets, an'uninterrupted passage or conduit for lubricating' materia which is supplied from grease-cups 38 fitted on the outer endsoftlieshaftsections34. Thesegreasecu are of the o .comprsion type an aresecuredinany'smtablemanner. e

. gether with pulleys .of corresponding lubricant passes out of the7 conduit formed by the shaft sections through small apertures 39 formed .atsuitable intervals.

The idler structure illustrated vin Figs. 3 and 4 is less rigid and less adapted to,v Withstand severe strains than that illustrated in Figs. l and 2, but is somewhat, less expensive, and supports the belt in the same Way, preventing the formation of well -defined lines f liexure in -the belt in imparting to the be t the substantially unifbrm transverse curvature throughout its entire width.

In order to'adapt the idler structure shown in Figs. 3 and 4 to belts of different widths, the shaft sections 34 may bereplaced by longer or shorter sections, as desired, to"

lengt Having now particularly described and ascertained the nature of my said invention land in what manner. the same is to be per- Iformed, I declare that what I claim is:

1. .A11 idler pulley structureifor belt conveyers having two inner brackets, a pulley. supported between them, auxiliary or sid brackets, each forming anextension of and movably mounted. or to one of said inner brackets, pulleys supported between the inner and the auxiliary or side brackets, and means for securing the said brackets to a suitable suepiport therefor, and inclined shafts mount in and extending outwardv from the auxiliary or side brackets with pulleys mounted thereon. n

2. In an idler conveyers, the com ination with a plurality of separate su porting brackets, of a plurality of auxillia brackets removably seulley structure for belt cured to and who y supported on said supporting brackets, a hollow shaft section sup.-

rted between said supporting brackets, lligllow shaft sections.,.sup rted between said auxiliary fbrackets an said supporting brackets, hollwy shaft sections projecting beyondv said auxiliary brackets and supported at an an le to said intermediate shaft sections, an Vcylindrical belt supporting pulleys mounted on each of said.

shaft sections.

3. An idlerv pulley structure for belt conveyers, having two'main or inner b and a pulley supported between them, means for adjusting each one of the said main or inner brackets upon a common sup ort for the two, and two auxiliary or side rackets each of which is secured to and is adjustable with one. of the mainor inner bracke and ulleys supported between the main or inner brackets and the auxiliary or side brackets.

4. An idler pulley structure for belt conveyers, having two main or inner brackets and a ulley supported between them, means for a justing each one of the said main or inner brackets upon a common sup rt for.

the two, and two auxiliary or side rackets each of which secured to and is adjustable with onepf the main or inner brackets2 'pulleys supported between the main or mner or side brackets, s rigidly mounted brackets and the auxilia outwardly 1projecting sha on the aux' iary or side brackets, loosely turning oli the said shafts.

5. An idler pulley structure for belt conveyers, havin two main and a. sutab e support to which the said brackets are secured, a pulley mounted between the said brackets, a. pair of auxiliary or side brackets umh removably mounted and l on and secured to oneof the said main or inner brackets; shafts extending between the said auxiliary or side brackets and the main or inner brackets and rigidly secured to each',

and pulleys and pulleys loosely turning upon the last said shafts.

In testimony whereof, I have signed my or inner brackets l ngxme in the presence of two witnesses.

THOMAS ROBINS.

Witnesses:

REGINA G. MORAN,

RoscoE L. PETERSON. 

